Hashemian, Maryam
Murphy, Gwen
Etemadi, Arash
Poustchi, Hossein
Sharafkhah, Maryam
Kamangar, Farin
Pourshams, Akram
Malekshah, Akbar Fazeltabar
Khoshnia, Masoud
Gharavi, Abdolsamad
Hekmatdoost, Azita
Brennan, Paul J.
Boffetta, Paolo
Dawsey, Sanford M.
Abnet, Christian C.
Malekzadeh, Reza
Article History
Received: 13 December 2017
Revised: 21 March 2018
Accepted: 23 May 2018
First Online: 28 June 2018
Competing interests
: The authors declare no competing interests.
: This work was supported by Tehran University of Medical Sciences; the Intramural Research Program of the US National Cancer Institute at the National Institutes of Health; Cancer Research UK [grant number 07CN120-B]; and through various collaborative research agreements with the International Agency for Research on Cancer.
: The study was approved by the Institutional Review Boards of the Digestive Disease Research Institute of Tehran University of Medical Sciences, Iran; the National Cancer Institute (NCI) in the United States; and the International Agency for Research on Cancer (IARC) in France. Informed consent All participants provided written informed consent at baseline.
: This work is published under the standard license to publish agreement. After 12 months the work will become freely available and the license terms will switch to a Creative Commons Attribution 4.0 International (CC BY 4.0).